Work them up!

"Human sexuality." You begin, leaning against the edge of your desk, showing off as much of your cleavage as possible for the watching room. "The process by which humans procreate... or more importantly for our discussion, share in the ultimate physical pleasure with a partner... tell me, how many of you have had sex before?" Despite the direct, personal question, every student's expression was of banality as the majority raised their hands. "Good." You purred. "There's nothing wrong with not having sex until now... perhaps you were all waiting for the right person? Or were waiting until marriage? But caught in the heat of the moment, it's the best thing in the world... and you're all here to find out all about it." You stand up straight, winking at a young nan near the front who didn't raise his hand. "Well by the end of this semester, you'll all be experts!"

Walking to a white board, you lean and show off your ass while you write the word "SEX" in the board. You turn away to do so, but the shifting you hear in their seats indicates just how effective your preparations were. The word itself hums with magical energy, your demon powers growing from the sexual energy in the room. You haven't even done anything, yet even these comments were starting them in the right direction.

Turning back to the room, the whole class is staring wide-eyed at you, men and women alike. Despite your not very subtle promises of power, the class needed a lot more before they broke. You'd start with one - "Can I get a... volunteer?" You giggle. You wait for someone to stand, eager to see who will be your first minion.